摘要
在高电压、大容量的直流输电系统中,交流侧谐波电流大,滤波电容器数量多,使得交流滤波电容器装置成为换流站可听噪声的主要来源之一。对近年来电容器振动与噪声研究进行了总结。通过分析排除了电容器内部的磁力作用和电容器心子与外壳间的电磁力影响,得出内部静电力是电容器振动与噪声的激励源。从功能转换的角度推导得出电容器极板受力与电压平方成正比。根据电容器振动与噪声特性及产生机理,分析了影响电容器振动噪声的主要因素,包括谐波频率与相位、浸渍剂、压紧系数和安装方式等。最后,论述了目前的噪声预估方法,并介绍了几种主要的降噪措施。综上所述,电容器内部的振动与传递过程是目前其减振降噪研究的重要内容,对电容器装置噪声的预估和降噪措施的研制均具有指导意义。
In high-voltage direct-current transmission system, there are numerical harmonic currents on the AC side. A number of AC filter capacitor units exist and become the main source of audible noise in converter stations. We reviewed the research of vibration and audible noise of power capacitors in recent years. By excluding the role of internal magnetic force and electromagnetic force between elements and walls, it is concluded that electro-static force exerting on elements can lead to vibration and audible noise of capacitors. This force is derived to be proportional to the square of voltage. Moreover,on the basis of the mechanism and characteristics of capacitor vibration and noise, we analyzed the predominate factors of affecting capacitor vibration and noise such as harmonic frequencies and phases, impregnated liquids, pressure factor and mounting methods. At last, we discussed prediction methods on capacitor noise, and introduced several noise mitigation structures of capacitors. It is found that investigation of internal vibration and vibration transportation of capacitors is the most important aspect, and it can be used to predict audible noise and design noise reduction method.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2016年第4期1159-1167,共9页
High Voltage Engineering
基金
国家自然科学基金(51377130
51507128)~~
关键词
滤波电容器
电力电容器
振动
可听噪声
减振降噪
filter capacitors
power capacitors
vibration
audible noise
noise reduction
作者简介
汲胜昌（通信作者）1976-，男，博士，教授，博导主要从事电气设备故障检测、绝缘结构优化设计、电力设备振动噪声特性研究及应用E—mail：jsc@xjtu．edu．cn
李金宇1990-，男，博士生主要从事电力电容器振动与噪声机理及减振降噪措施的研究工作E—mail：jason．leejy@stu．xjtu．edu．cn
祝令瑜1988-，男，博士，讲师主要从事电力设备振动噪声特性及其机理、高压柔性直流输电方面的研究工作E—mail：zhuly102@gmail．com
